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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 689 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.44 × 4 =
  2. 2.139 × 4 =
  3. 3.147 × 4 =
  4. 4.25 × 8 =
  5. 5.13 × 4 =
  6. 6.44 × 8 =
  7. 7.111 × 4 =
  8. 8.61 × 8 =
  9. 9.32 × 8 =
  10. 10.137 × 4 =
  11. 11.19 × 8 =
  12. 12.52 × 8 =
  13. 13.56 × 8 =
  14. 14.69 × 8 =
  15. 15.40 × 8 =
  16. 16.23 × 8 =
  17. 17.68 × 8 =
  18. 18.20 × 8 =
  19. 19.39 × 8 =
  20. 20.139 × 4 =
  21. 21.63 × 8 =
  22. 22.56 × 8 =
  23. 23.37 × 8 =
  24. 24.22 × 4 =
  25. 25.95 × 4 =
  26. 26.85 × 4 =
  27. 27.36 × 8 =
  28. 28.143 × 4 =
  29. 29.87 × 4 =
  30. 30.15 × 4 =
  31. 31.148 × 4 =
  32. 32.16 × 8 =
  33. 33.69 × 8 =
  34. 34.23 × 8 =
  35. 35.40 × 4 =
  36. 36.120 × 4 =
  37. 37.21 × 8 =
  38. 38.17 × 8 =
  39. 39.15 × 8 =
  40. 40.144 × 4 =

Answer key

  1. 176
  2. 556
  3. 588
  4. 200
  5. 52
  6. 352
  7. 444
  8. 488
  9. 256
  10. 548
  11. 152
  12. 416
  13. 448
  14. 552
  15. 320
  16. 184
  17. 544
  18. 160
  19. 312
  20. 556
  21. 504
  22. 448
  23. 296
  24. 88
  25. 380
  26. 340
  27. 288
  28. 572
  29. 348
  30. 60
  31. 592
  32. 128
  33. 552
  34. 184
  35. 160
  36. 480
  37. 168
  38. 136
  39. 120
  40. 576

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